Mokhoa oa litheko tsa tungsten tsa China o ntse o le holim'a kamano lipakeng tsa phepelo le tlhoko.Ka kakaretso, ho hlaphoheloa ka lehlakoreng la tlhokahalo ho hlōleha ho finyella tebello ea 'maraka, likhoebo tse tlaase li batla litheko tse tlaase' me bahoebi ba nka boemo bo hlokolosi.Ka phaello e fokotsehileng, 'maraka oa tungsten o ka' na oa theoha ka nako e khutšoanyane.

'Marakeng oa li-tungsten, bofokoli bo lehlakoreng la tlhokahalo bo hatella liphaello tsa likhoebo tsa merafo mme thekiso ea lisebelisoa tse teng e tlas'a khatello.Ka lehlakoreng le leng, tšireletso ea tikoloho, litšenyehelo le lintlha tse ling li matlafatsa maikutlo a bahlahisi a ntseng a phahama;ka lehlakoreng le leng, batho ba ka hare ba ntse ba tšoenyehile ka lehlakore le fokolang le ka 'na la e-ba thata ho tšehetsa' maraka.

Bakeng sa 'maraka oa APT,' maraka o foofo ke lona lebaka le ka sehloohong la ho theoha ha theko, hammoho le tšusumetso ea khaello ea lichelete sehleng sa bone, barupeluoa ba 'maraka ba bonts'a maikutlo a tšoenyehileng.Mmaraka oa phofo oa tungsten le ona o lula o fokola ka lebaka la tebello e sa hlakang ea tebello ea 3C, likoloi le liindasteri tse ling.